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Multitask Online Learning: Listen to the Neighborhood Buzz
April 9, 2024, 4:43 a.m. | Juliette Achddou, Nicol\`o Cesa-Bianchi, Pierre Laforgue
cs.LG updates on arXiv.org arxiv.org
Abstract: We study multitask online learning in a setting where agents can only exchange information with their neighbors on an arbitrary communication network. We introduce $\texttt{MT-CO}_2\texttt{OL}$, a decentralized algorithm for this setting whose regret depends on the interplay between the task similarities and the network structure. Our analysis shows that the regret of $\texttt{MT-CO}_2\texttt{OL}$ is never worse (up to constants) than the bound obtained when agents do not share information. On the other hand, our bounds …
abstract agents algorithm analysis arxiv communication cs.lg decentralized information neighbors network online learning study type
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